Can you substitute beer for soda water in tempura batter?

It's not recommended to substitute beer for soda water in tempura batter. Here's why:

* Carbonation: Soda water is primarily used for its carbonation, which helps create light and crispy tempura. Beer also contains carbonation, but it also has alcohol and other ingredients that can affect the batter's texture and flavor.

* Alcohol content: The alcohol in beer can evaporate during frying, resulting in a less crispy batter and a slightly different taste.

* Flavor profile: Beer has a distinct flavor that may not be desired in tempura. Soda water, on the other hand, is flavorless and allows the natural flavors of the ingredients to shine through.

Alternatives to soda water:

* Sparkling water: A good substitute for soda water, it provides the necessary carbonation without any added flavor.

* Chilled water: If you don't have soda water or sparkling water, you can use chilled water. It won't be as light and crispy, but it will still work.

* Ice water: Similar to chilled water, ice water can be used as a substitute for soda water.

Remember: The key to successful tempura is using cold ingredients and a light, airy batter.